It's not a matter of preference
Generator placement is governed by two overlapping sets of requirements: the manufacturer's installation manual (which specifies minimum clearances from walls, windows, and doors for airflow and exhaust safety) and your local building/fire code (which may add setback requirements from property lines). An installer confirms both during the site assessment — this isn't something to guess at.
Why the clearance exists
The main concern is exhaust: carbon monoxide from the generator's exhaust needs to stay away from windows, doors, and fresh-air intakes. Clearance requirements also account for service access (a technician needs room to work) and airflow for the unit's cooling system.
Noise and neighboring property lines
Some local codes add a separate setback from property lines specifically for noise, independent of the manufacturer's exhaust-related clearance — this matters most on smaller lots where the generator's likely placement sits close to a neighbor's yard or window. A sound-dampening enclosure is sometimes used to help meet these requirements without moving the unit further from the house than the site allows.
Frequently asked questions
Sources
- NFPA 37 — Standard for the Installation and Use of Stationary Combustion Engines and Gas Turbines — Covers clearance, ventilation, and safety requirements for stationary standby generators.
- Local building/electrical permitting authority — The authority having jurisdiction sets the actual permit and inspection requirements for your specific address.